This was posted by Skrillex earlier today on Facebook:
This is devastating news to all of those that have been anticipating this cross Canadian tour since it was first announced last year. The 2nd edition of the Full Flex Express was highly anticipated among Canadian fans as last year's tour was so memorable.
I hope this cancellation doesn't ultimately prevent Skrillex from coming to Canada this summer as there are still plenty of high quality festivals that could still book him. If Skrillex is re-booked at a few Canadian events then not all is lost, but if this news means that Skrillex will not be coming to Canada at all this summer then today's announcement will be a tough pill to swallow for Skrillex/OWSLA fans.